问题
选择题
My sister is so busy that she really can't help _______ some washing. [ ]
A. does
B. to do
C. doing
答案
答案：B
搜题请搜索小程序“爱下问搜题”
My sister is so busy that she really can't help _______ some washing. [ ]
A. does
B. to do
C. doing
答案：B